Lamp.



S. E. TRISLBR.

LAMP.

APPLICATION FILED MAY 13, 1912.

1,081,875. Patented Dec. 16,1913.

2 SHEETS-SHEET l.

S. E. TRISLER.

LAMP.

APPLICATION FILED MAY 13,1912.

1,081,875. Patented Dec. 16, 1913.

2 SHEETS-SHEET 2.

Warren STATES PAEENT orrion.

SAMUEL E. TRISLER, OF DAYTON, OHIO.

LAMP.

Specification of Letters Patent.

Application filed May 13, 1912.

To all whom it may concern:

Be it known that I, SAMUEL E. Tinsiinn, a citizen of the United States, residing at Dayton, in the county of hlontgomery and State of Ohio, have invented certain new and useful Improvements in Lamps, of which the following is a specification.

My invention relates to lamps and particularly to that type of lamps suitable for use as head lights for locomotives, autoinobiles, motorcycles, vessels or other fast moving vehicles, and more particularly to ventilating means for such lamps.

The object of the invention is to provide a lamp which shall be simple in construction and economical in manufacture, pro vided with a system of forced ventilation, which will permit the use of a burner or illuminating member of great capacity. In lamps of this type as usually constructed, particularly those employing hydro-carbon or gaseous fuels a considerable amount of heat is developed Within the lamp chamber and the burned gases and other products of combustion collect within the lamp chamber giving to the light a reddish color and destroying its brilliancy. Such spent gases and other products of combustion which collect within the chamber seriously interfere with the combustion causing the flame to flicker and to decrease in intensity.

One of the primary objects of the present invention is to provide an efficient system of ventilation which will effectually carry off the spent gases and products of combustion and in which the current of air is prevented from effecting the flame.

WVith the above primary and other incidental objects in view as will more fully appear in the specification, the invention consists of the features of construction, the parts and combinations thereof, and the mode of operation, or their equivalents, as hereinafter described and set forth in the claims.

Referring to the drawings, Figure 1 is a perspective view of the assembled lamp. Fig. 2 is a longitudinal sectional view there of. Fig. 3 is a front elevation of the lamp. Fig. 4 is a detail perspective view partly broken away of the ventilator housing. Fig. 5 is a detail bottom plan view partly in section of said housin Fig. 6 is a transverse sectional. detail view of the air inlet conduits, showing the directions in which said conduits discharge their currents of air.

Patented Dec. 16, 1913.

Serial No. 696,803.

Like parts are indicated by similar charactors of reference throughout the several views.

In constructing the lamp there is employed a cylindrical body portion 1 preferably formed flaring or bell shaped at its forward end as shown at 2. At its forward end. the body portion 1 is provided with a transparent glass cover plate 3 carried in a suitable annular frame 4; which is preferably, though not necessarily, hinged to the body portion of the lamp as at 5. At its rear end the body portion 1 is provided with a head, upon the inner surface of which is carried a parabolic or a semi spherical reflector 7. Like the forward frame 4, the rearward head (3 is preferably, though not necessarily, hinged to the body portion 1 as shown at 8. In the drawing the lamp has been shown as provided with a burner 9 especially adapted for the use of acetylene gas as fuel. It is obvious, however, that burners of other designs for using various kinds of hydro-carbon or gaseous fuels might be employed. It is equally obvious that an electric bulb might be substituted for the gas burner shown. As thus far described the lamp corresponds closely with the construction usually employed in head lights of this character.

To provide for the dispersal of the heat and products of combustion generated by the burner, the top of the housing 1 is cut away as shown at 10 and immediately above the opening thus provided there is located a double housing 11. The housing 11. com prises two parallel casings or shells '12 and '13 having convex top surfaces and vertical side walls. Such shells or casings 12 and 13 are separated one from the other by an intermediate space for the passage of air. In the top surface of the inner shell or easing 12 there are provided a plurality of ventilating slots 14L. The material removed in forming the ventilating slots 14 is bent upward to inclined positions to form a series of ballle plates 15, one such batlle plate for each of the ventilating slots. These baille plates cause the ventilating slots to open in a rearward direction, thereby pre venting an inrushing current of air from the front of the lamp entering through said ventilating slot to the interior thereof. In the side walls of the inner shell or casing 12 are similar ventilating slots 16, the flap of the material removed to form said openings or slots being bent outward and extending in a rearward direction whereby said side ventilating slots will open rearward. The inner shell or casing 12 rests upon the main body 1 at either side of the opening 10 and at its rear end is provided with a wall 17 engaging the exterior of the main portion 1. At its forward end the shell or casing 12 is curved downward as shown at 18 into engagement with the flaring or bell shaped flange 2 of the main body. Thus the edges of the shell or casing 12 are in full contact with the main body of the lamp throughout and the only egress of the spent gases is through the aforementioned ventilating slots in the top surface and side walls of the shell. The exterior shell or casing 13 is provided with a continuous or imperforate top surface extending substantially parallel with the surface of the inner shell or casing 12 and with the vertical side walls engaging and supported upon the cylindrical main portion 1. As before stated the exterior shell or casing 13 is spaced away from the inner shell or casing 12 thereby forming an intermediate air space. This inter mediate air space is open at its forward end as shown at 19 and at its rearward end as shown at 20. While the top surface of the exterior shell or casing is imperforate, the side walls thereof are provided with vertically disposed ventilating slots 21, which however are offset or out of registry in their relation to the vertical ventilating slots of the inner shell or casing 12. The flaps 22 of material pressed from the side walls of the shell or casing 13 to form the ventilating slot 21 are pressed outward and directed in a forward direction or the opposite of those in the inner shell or casing 12. Vhile the projecting deflectors or battle plates of the inner shell or casing 12 tend to prevent the air which enters through the forward opening 19 from passing into the ventilating slots 21 in the interior shell tend to direct the air into said shell to the intermediate air space between the interior shells. As the lamp is carried forward upon a rapidly moving vehicle a current of air rushes into the intake opening 19 at the forward extremity of the housing 11 and also into the vertical ventilating slots 21 of the exterior shell and passes rearward through the intermediate air spaces between the interior and exterior shells escaping through the opening 20 at the rear of the housing. This rapidly moving current of air is prevented from entering the interior of the lamp by the rearward directed baffle plate in the top surface and side walls of the interior shell or casing 12. The rapid rearward movement of the current of air through intermediate air space creates a. suction which tends to draw the spent gases and products of combustion from the interior of the lamp through the ventilating slots of the interior shell or casing, causing said products of combustion to be discharged through the rearward opening 20 of the housing 11. By this construction there is created a forced draft which rapidly disperses the products of combustion enabling the lamp to be constructed of smaller size in proportion to the capacity of its burner. To insure a proper supply of oxygen to the burner and to obviate any stagnation of the spent gases within the concave reflector 7 there are provided air inlet conduits 23 located on the exterior of the main body 1 of the lamp and adjacent to the lower portion thereof. These conduits 23 are open at their forward ends but are closed at their rearward extremities except for a slot or opening 2% through which they communicate with the exterior of the lamp chamber. As the lamp is carried rapidly forward the air not only rushes through the intermediate air space between the interior and exterior shells 12 and 13 creating a suction from the interior of the lamp but the air also is forced into the open mouths of the intake conduit 23 by which it is conveyed to the interior of the lamp chamber through the openings 24. By this construction a constant current of fresh air is caused to pass through the lamp chamber and between the flame and the concave reflector thereby preventing an accumulation of gases which might tend to affect the quality of the light or interfere with proper combustion of the fuel. In the event that the exterior of the lamp is given a highly polished finish, the inner side of the top of the exterior shell or housing 13 is preferably provided with an asbestos coating not shown which will protect the polished finish from injury by the heat.

From the above description it will be apparent that there is thus produced a device of the character described, possessing the particular features of advantage before enumerated as desirable but which obviously is susceptible of modification in its form, proportion, detail construction, and arrangement of parts, without departing from the principle involved or sacrificing any of its advantages.

While in order to comply with the statute, the invention has been herein described in language more or less specific as to certain structural features, it is to be understood that the invention is not limited to any specific details, but that the means and mechanism herein shown and described comprise but one mode of putting the invention into effect and the invention is therefore claimed broadly in any of its possible forms or modifications within the scope of the appended claims.

Having thus described my invention, I claim;

1. In a lamp, a combustion chamber hav ing an exit opening for the products of combustion in the upper portion thereof, a top or dome inclosing the exit opening and having imperforate front and rear walls, but provided with rearwardly opening outlet orifices for the products of combustion otherwise located therein, and a housing or casing inclosing said top or dome open to the atmosphere at its front and rear ends and spaced away from the inclosed top or dome to form an intermediate air passage extending fore and aft in alinement with the normal direction of movement of the lamp with which the outlet orifices of the top or dome communicate, substantially as specified.

2. in a lamp as described, a combustion chamber, a top for said chamber closed at its forward end having a plurality of substantially U shaped slots elsewhere located therein, the flap of material defined by such U shaped slot being bent upward and directed rearward, and a cover located above said slotted top and spaced away therefrom to form an air passage open at its forward and rearward ()Xi'l'Ol'IlltlGS, substantially as specified.

3. In a lamp as described, a combustion chamber, a double housing mounted on the combustion chamber, one housing being inclosed Within the other, the inner housing being closed at its front and rear extremities, the outer housing being open at its front and rear extremities, said inner and outer housings being spaced one from the other to form an air passage open at its forard and rearward extremities, intercomnninicating openings between the combustion chamber and air passage, and ba'tlles located at the forward side of such openings, substantially as specified.

4. In a lamp as described, a combustion chamber, an air passage located above said combustion chamber and having air inlet orifices in the longitudinal wall thereof and an outlet orifice at the rear thereof and intercomnnmicating openings between the combustion chamber and said air passage through which the products of combustion are drawn by suction draft induced by the said air current, substantially as specified.

5. In a lamp as described a combustion chamber, a double walled housing superposed upon the combustion with which it communicates the walls of said housing being separated one from the other to form an intermediate air passage, said air passage being open at its front and rear extremities, the inner wall of said housing having a series of rearward directed orifices therein substantially as specified.

G. In a lamp as described, a combustion chamber, a double walled housing superposed upon the combustion chamber with which it communicates comprising inner and outer shells each having top and side walls parallel with the correspomliin parts of the other shell but spaced therefrom to form an intermediate air passage, the outer shell having ventilating openings in its side walls for the entrance of air to said intermediate passage, the inner shell having ventilating openings in its side walls for the escape of the products of combustion from the combustion chamber into said intermediate passage, the openings of one shell being out of registry with those of the other shell, substantially as specified.

7. In a lamp, a combustion chamber, a ventilator dome therefor having double side walls spaced one from the other to form an intermediate passage, each of the walls having ventilator openings therein formed by substantially U shaped slots in said side walls, the flaps of material defined by such U shaped slots being bent outward, the said flaps of the inner and outer walls being turned in opposite directions, substantially as specified.

S. In a lamp, a combustion chamber, a burner and a reflector therein, a ventilator dome for the combustion chamber, and an inlet air conduit adjacent to the bottom of the COITlbUStlOIl chamber, said inlet conduit being open to the atmosphere at its forward end and open to the interior of the combustion chamber at a point intermediate the burner and reflector, and a deflector adjacent to the inlet orifice adapted to direct the current of air onto the reflector, substantially as specified.

9. In a lamp a combustion chamber, a burner and a reflector therein, an air inlet conduit adjacent to the bottom of the combustion chamber said conduit having its intake orifice projected beyond the periphery of the lamp and opening in a forward direction and having its discharge orifice into the combustion chamber intermediate the burner and reflector whereby the advance movement of the lamp will cause a current of air to be forced through said conduit into the combustion chamber, and a ventilator top for said combustion chamber providing egress for the said current of air and the products of combustion, substantially as specified.

1.0. In a lamp, a combustion chamber, a burner and a reflector in said chamber, an air inlet conduit adjacent; to the bottom of the chamber communicating therewith at a point intermediate the burner and reflector, said conduit being open to the atmosphere in a forward direction, whereby the forward movement of the lamp will induce a draft there through, and a ventilator in the top of said combustion chamber for the escape of said air and the products of combustion, substantially as specified.

11. In a lamp, a combustion chamber, a burner and a reflector therein, said chamber having a plurality of air inlet orifices in the wall thereof intermediate the burner and reflector at separated points, each orifice adapted to direct a current of air upon the reflector from a different radial position, whereby the direction of the several eurrents of air will be angular one with the other, substantially as specified.

12. In a lamp, a combustion chamber having in its upper portion an exit opening for the products of combustion, a top or dome inclosing the exit opening, said dome having an imperforate front wall but having air outlets elsewhere located therein, and external deflectors extending reawvardly and outwardly adjacent to the forward edges of the outlet openings, substantially as speci fied.

18. In a lamp, a combustion chamber having in its upper portion an exit opening for the products of combustion, a top or dome inclosing said exit opening, said top or dome having air inlet orifices in the longitudinal wall thereof, external deflectors extending outwardly and forwardly adjacent to the rear edges of the air inlet orifices, and an air outlet adjacent to the rear of said top or dome and means within the dome toopen at its forward and rearward extremities, the combustion chamber and passage having-Queer more rearwardly opening intercommunicating orifices, substantially as specified.

In testimony whereof, I have hereunto set my hand this 26 day of April 1912.

SAMUEL E. TRISLER.

l Vitnesses ALFRED MCCRAY, EFFIE B. LUTTRINGES.

Copies of this patent may be obtained for five ,cents each, by addressing the Commissioner of Patents, Washington, D. G. 

